Heat-resistant steel casting for petrochemical tubular furnace

The utility model relates to the related technical field of heat-resistant steel castings, and particularly discloses a heat-resistant steel casting for a petrochemical tubular furnace, which comprises a base, a support plate is mounted on the upper surface of the base, a group of connecting plates are inserted into the upper end of the support plate, and a transmission plate is slidably arranged at one end, far away from the support plate, of each connecting plate. A supporting sleeve is fixed to the end, away from the connecting plate, of the transmission plate, a limiting ring penetrates through the outer side wall of the supporting sleeve, and a bolt is in threaded connection with the bottom of the supporting plate and penetrates through the base. A set of inserting grooves are formed in the upper end face of the supporting plate, the inserting grooves are in a T shape, one end of the connecting plate is matched with the inserting grooves, the base and the supporting plate can be detachably connected thro